## 35 Reputation

10 years, 161 days

## Maple is giving "Error, (in fprintf) str...

Maple

Hello,

I am collecting my coefficients with the below code. Since it is a huge data, i just give a some partion. So I want to write u11 to a text file. But when i use this command  save u11, "u111.txt" . It is writing to text but with big blanks. I show you at the below picture. So when i put it to matlab, it is again with spaces and matlab giving errors. So how can i save my long symbolic output (you can see in picture)  to a text file without spaces. I used

fd := "C:/double/u11.txt"

fprintf(fd, "%s", u11)

fclose(fd)

But it did not work. So if you could help me, i really appreciate. My best regards.

## Showing linear system with for loop...

Hello,

i need help to translate a system which is given below to a for loop.

Other wise i am writing it with myself.

instead of doing it like that

with(LinearAlgebra);

sys := [galerkin_funcs[1], galerkin_funcs[2], galerkin_funcs[3], galerkin_funcs[4], galerkin_funcs[5], galerkin_funcs[6], galerkin_funcs[7], galerkin_funcs[8], galerkin_funcs[9], galerkin_funcs[10]];

var := [w[1], w[2], w[3], w[4], w[5], w[6]];

Kmat, Fmat := GenerateMatrix(sys, var);

i want to do it like that.

N:=10

for i to N+4 do

sys(1,i) := galerkin_funcs[i]

end do

for i to N do

var(1,i) := w[i]

end do

After that i will generate matrix with this comman Kmat, Fmat := GenerateMatrix(sys, var);

But this for loop i wrote is not doing the i want to do.

## Can't solve systems of equations ...

Hello friends;

I want to solve 3 - second orger equations with  6 unkowns.

When i say just dsolve without boundry conditions it is solving but so complicated.

_C6Ci  it is giving like that which i dont know the meaning of Ci.

But with boundry conditions it is not solving .

Thanks.

Curvedbeam_static_variablethickness_analitik4.mw

## Can't solve system of equation with 4 un...

Hello friends;

I uploaded the file. Firstly i solved the 4. order ode. I converted it to trigonometric functions from exponantial.

I have 4 equation and 4 unkowns. I thought , it is sufficient to solve this. As you see , i can not solve the system .

May you help me please where i am doing wrong.

Thanks.

odev4.mw

## Solving ODE's system and couldnt get an...

Maple

Hello everyone,

I have a problem solving with ODE's system solving. I have 2 equation and 4 initial  conditions. When i calculate like that,u can look this file.  beamsolvingfortim.mw. It is working it is giving me T1 and T2 equations depends on time.

In 2. system which i have a problem i want to calculate this equations depends on x(displacement). I have again 2 equation and 4 boundry conditions. it is solving the ODE'S system without boundry conditions. (It is giving with C1 C2 C3 and I)Problem is when i want to find its values with boundry conditions it is not giving a result. Is there a problem with complex number(I) or boundry conditions are not enough?

> evalf(dsolve({sys}));

{X1s(x) = -3.060206320 + _C1 exp(-0.3487988669 x)

+ _C2 exp(0.3487988669 x) + _C3 exp(-0.3563227426 I x), X2s(x) =

-0.6321326989 _C1 exp(-0.3487988669 x)

+ 0.6321326989 _C2 exp(0.3487988669 x)

- 0.6053448484 I _C3 exp(-0.3563227426 I x)}

When i write like that, nothing is happening. I also upload the files. If u can help , i would be really appreciate.

eq2 := dsolve({A, B, bc}, [X1s(x), X2s(x)])

beamsolving(thick.mw

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